Home / 21,432.30-32,147.21-6,439.10

Finding the Fourth Proportional to 21,432.30, 32,147.21 and 6,439.10

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Solution

The fourth proportional to 21,432.30, 32,147.21 and 6,439.10 is: 9,658.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,432.30 : 32,147.21 = 6,439.10 : x
  2. Step 2: Convert to fraction form
    21,432.30/32,147.21 = 6,439.10/x
  3. Step 3: Cross multiply
    21,432.30x = 32,147.21 × 6,439.10
  4. Step 4: Simplify right side
    21,432.30x = 206,998,937.16
  5. Step 5: Solve for x
    x = 206,998,937.16/21,432.30
  6. Step 6: Final answer
    x = 9,658.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.